mac-syphon: Fix usage of methods deprecated since macOS 11.0

`absolutePathForAppBundleWithIdentifier` and `openFile` have both been
deprecated since macOS 11.0. This pr uses the correct modern APIs when
OBS is compiled for macOS 11.0 or more recent and falls back to the
legacy APIs when either compiled against or run on older macOS versions.

plugins/mac-syphon/syphon.m

@@ -2,6 +2,7 @@
 #import <ScriptingBridge/ScriptingBridge.h>
 #import "syphon-framework/Syphon.h"
 #include <obs-module.h>
+#include <AvailabilityMacros.h>
 
 #define LOG(level, message, ...)                                    \
 	blog(level, "%s: " message, obs_source_get_name(s->source), \
@@ -621,7 +622,19 @@ static inline NSString *get_inject_application_path()
 {
 	static NSString *ident = @"zakk.lol.SyphonInject";
 	NSWorkspace *ws = [NSWorkspace sharedWorkspace];
+#if (__MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0)
+	if (@available(macOS 11.0, *)) {
+		NSURL *url = [ws URLForApplicationWithBundleIdentifier:ident];
+		return [url absoluteString];
+	} else {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+		return [ws absolutePathForAppBundleWithIdentifier:ident];
+#pragma clang diagnostic pop
+	}
+#else
 	return [ws absolutePathForAppBundleWithIdentifier:ident];
+#endif
 }
 
 static inline bool is_inject_available_in_lib_dir(NSFileManager *fm, NSURL *url)
@@ -865,7 +878,24 @@ static void show_syphon_license_internal(void)
 		return;
 
 	NSWorkspace *ws = [NSWorkspace sharedWorkspace];
+
+#if (__MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0)
+	if (@available(macOS 11.0, *)) {
+		NSURL *url = [NSURL
+			URLWithString:
+				[NSString
+					stringWithCString:path
+						 encoding:NSUTF8StringEncoding]];
+		[ws openURL:url];
+	} else {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+		[ws openFile:@(path)];
+#pragma clang diagnostic pop
+	}
+#else
 	[ws openFile:@(path)];
+#endif
 	bfree(path);
 }